Metering device for anesthetics

A method for metering anesthetic, the method comprising the steps of:

• providing an assembly unit that can be removed from a medical apparatus as a module;
• filling a liquid anesthetic into a reservoir of the assembly unit;
• providing an intermediate container and delivering an amount of anesthetic from the reservoir to the intermediate container;
• connecting a metering gas source to the intermediate container;
• metering anesthetic on a discharge side of the intermediate container;
• evaporating the metered anesthetic;
• and
• delivering the evaporated metered anesthetic as anesthetic vapor from the unit to the medical apparatus via a connector.

A metering device for anesthetic that can be removed from a medical apparatus, the device comprising:

• a filling device for introducing the anesthetic to the metering device;
• a reservoir for receiving the introduced anesthetic;
• reservoir valving for controlling movement of the anesthetic from said reservoir to a storage tank;
• a pressure source with gas valving for pressurizing said storage tank with a gas;
• a blow off valve for controlling movement of the anesthetic from said storage tank to an intermediate container;
• a flow metering element for metering flow of the anesthetic from said intermediate container to an evaporator chamber;
• and
• a flow sensor for measuring flow of the anesthetic from said evaporator chamber to an anesthetic feed line.